Chemainus Roof Treatment Specialists

Professional roof treatment in the Victoria and Vancouver Island area typically costs $0.25–$0.90 per square foot. A standard 1,800 sq ft home roof costs $450–$900, depending on pitch and degree of biological growth. Roof Labs Canada provides free on-site quotes.

Roof Labs Canada guarantees 3 years moss-free from the date of treatment. In practice, many roofs remain clean for 4–5 years depending on tree shade, roof aspect, and local rainfall. All our work is backed by a written guarantee.

Yes. We use professionally diluted biocide solutions and standard runoff management to protect gardens, lawns, and waterways. Our products meet BC Ministry of Environment standards for urban application near stormwater systems.

No. Most treatments take 2–4 hours and require no interior access. We ask that people and pets stay away from the treatment area during application. You receive a full written treatment report by email same day.

Pressure washing physically strips granules from asphalt shingles and splits cedar fibre — causing permanent damage while not killing the root biology. Biocide treatment kills organisms at the root level without damaging roofing materials, preventing regrowth for 3+ years.